QuestionQ1103

IP Connectivity

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Refer to the exhibit. Which ip route command created the best path for a packet destined for 10.10.10.3?

  • A ip route 10.10.0.0 255.255.252.0 g0/0
  • B ip route 10.10.10.0 255.255.255.240 g0/0
  • C ip route 10.0.0.0 255.0.0.0 g0/0
  • D ip route 10.10.10.1 255.255.255.255 g0/0
Explanation

IP routing selects the most specific matching route, using longest-prefix match. The destination 10.10.10.3 matches 10.10.10.0/28, and that prefix is more specific than 10.0.0.0/8. It does not fall within 10.10.0.0/22, and a /32 route to 10.10.10.1 matches only that single host, not 10.10.10.3. Therefore the best path is the route to 10.10.10.0 255.255.255.240.

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